<https://twitter.com/kotlin/status/116894678445193...
# announcements
u
https://twitter.com/kotlin/status/1168946784451932161 In Foo::bar, bar can also be an extension to Foo. Like in Char::isLetterOrDigit. #KotlinTips

https://pbs.twimg.com/media/EDju5t2W4AAa2vS.png

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